Gorman-Rupp Pumps 612M60-B 1453214 and up - Manual (Page 27)

60 SERIES OM−04407
MAINTENANCE & REPAIR PAGE E − 8
be replaced any time the shaft and bear-
ings are removed.
The bearings may be heated to ease installation.
An induction heater, hot oil bath, electric oven, or
hot plate may be used to heat the bearings. Bear-
ings should never be heated with a direct flame or
directly on a hot plate.
Use caution when handling hot bearings to
prevent burns.
NOTE
If a hot oil bath is used to heat the bearings, both the
oil and the container must be absolutely clean. If
the oil has been previously used, it must be thor-
oughly filtered.
Heat the bearings to a uniform temperature no
higher than 250
_ F (120_ C), and slide the bear-
ings onto the shaft, one at a time, until they are fully
seated. This should be done quickly, in one con-
tinuous motion, to prevent the bearings from cool-
ing and sticking on the shaft.
Secure the roller bearing on the shaft with the bear-
ing retaining ring (32).
After the bearing has been installed and allowed to
cool, check to ensure that it has not moved away
from the shaft shoulder in shrinking. If movement
has occurred, use a suitably sized sleeve and a
press to reposition the bearing against the shaft
shoulder.
Slide the heated outboard bearings (21) onto the
shaft, one at a time, with the larger inner races of
each bearing positioned away from each other as
shown in Figure C−3.
If heating the bearings is not practical, use a suit-
ably sized sleeve, and an arbor (or hydraulic) press
to install the bearings on the shaft.
When installing the bearings onto the
shaft, never press or hit against the outer
race, balls, or ball cage. Press only on the
inner race.
Secure the assembled shaft and bearings by
clamping on the surface between the bearings.
Use caution not to scratch or mar the part number
etched into the shaft in this area. Install the tab
washer (22) and bearing lock nut (24). Torque the
lock nut to 150 ft. lbs. (1800 in. lbs. or 20,7 m. kg.).
Locate the tab on the lockwasher that aligns with a
slot in the lock nut, and bend the tab over into the
slot.
Slide the shaft and assembled bearings into the
pedestal until the shoulder on the inboard ball
bearing (21) seats against the pedestal.
When installing the shaft and bearings into
the bearing bore, push against the outer
race. Never hit the balls or ball cage.
Press the oil seal (29) into the bearing cap (16) with
the lip positioned as shown in Figure C−3. Lubri-
cate and install a new bearing cap O-ring (23) and
secure the bearing cap with the capscrews (26).
Use caution not to cut or roll the lip of the oil seal
(29) when installing the bearing cap.
Press the oil seal (33) into the bearing cap (16) with
the lip positioned as shown in Figure C−3. Replace
the bearing cap gasket (17) and secure the bear-
ing cap with the capscrews (15). Use caution not to
cut or roll the lip of the oil seal when installing the
bearing cap.
Lubricate the pedestal as indicated in LUBRICA-
TION.
Pedestal Assembly Installation
Use a suitable hoist and sling to position the ped-
estal assembly on the base. Secure the pedestal to
the base using the previously removed hardware.